eventlet.py 文件源码

def _yield_before_after():
    # Yield to any other co-routines...
    #
    # See: http://eventlet.net/doc/modules/greenthread.html
    # for how this zero sleep is really a cooperative yield to other potential
    # co-routines...
    eventlet.sleep(0)
    try:
        yield
    finally:
        eventlet.sleep(0)